We are building a new house and I'm installing the laminate wood flooring. The builder suggested I cover the flooring after I'm done to protect it during the last few weeks of construction and with moving in. What would you suggest I use? Rosin paper, Kraft paper, or something more?
If you don't have any heavy duty canvas type drop cloths, then use a couple of layers of red rosin paper. Tape the seams and around the perimeter to hold it in place. Keep an eye on it and tape or put an extra piece on any areas that get ripped. Red Rosin is much better than plastic as it is not slippery to walk on and is fairly tough for foot traffic.
A product that I recently saw in use on a commercial construction job at my office is purpose-made for this application. It's called Ram Board, and it's a super thick non-corrugated cardboard sheet that comes in rolls.
This should give some protection from impacts as well as scuffs. Tougher than rosin paper, easier to handle than masonite.
No idea what it costs, but I'd consider it if I had multiple trades working on top of my hardwood floors.
Your local bodyshop has tons of cardboard they are more than happy to get rid of. Large boxes that hoods and body panels are packaged in. 3 or 4 hood boxes will cover a room.
I have used Ram Board and it is excellent and waterproof (for some time). The edges can easily fold up to protect baseboards as well.